Principal Frontend Engineer

About the Role We are seeking a hands-on Principal or Senior Frontend Engineer to help build the next generation of AI-powered product experiences on top of large-scale knowledge systems and domain-specific datasets. This role is ideal for someone who enjoys operating at the intersection of frontend engineering, AI-powered user experiences, product development, and platform architecture. You'll work closely with technical leadership to design, build, deploy, and iterate on intelligent applications that leverage large language models, retrieval systems, recommendations, search, and AI-assisted workflows. This is not a pure UI implementation role. We are looking for builders who can take ideas from concept to production, own the full user experience, and thrive in a fast-moving, high-ownership environment. What You'll Do Design and build AI-native user experiences that help users discover, consume, and interact with information more effectively. Develop frontend applications integrating LLMs, semantic search, recommendations, and AI copilots. Create highly performant React and TypeScript applications used by large audiences. Build rich interfaces that surface AI-generated insights, recommendations, summaries, and workflows. Partner closely with design, product, data, and engineering teams to rapidly validate concepts and ship new capabilities. Architect reusable frontend systems, design patterns, and shared component libraries. Influence frontend strategy, technical direction, and product architecture. Continuously improve performance, reliability, accessibility, observability, and user experience across the platform. Key Responsibilities AI-Powered Product Experiences AI copilots and assistants LLM-powered user interfaces Conversational experiences AI-assisted workflows Search and discovery experiences Recommendations and personalization AI evaluation and user feedback loops Prompt and interaction design Frontend Architecture React and TypeScript application architecture Component systems and design systems State management patterns Micro-frontends (where appropriate) Performance optimization Accessibility and responsive design Testing and frontend quality frameworks Frontend observability and monitoring Product Engineering User-facing product development Rapid prototyping and experimentation A/B testing frameworks Analytics-driven iteration Collaboration with product and design End-to-end feature ownership Customer-centric product development Desired Technical Experience Frontend React TypeScript Next.js JavaScript HTML5 / CSS3 Frontend testing frameworks State management (Redux, Zustand, React Query, etc.) Design systems and component libraries AI / ML Integration OpenAI, Anthropic, Gemini, or similar models AI-powered applications RAG-powered user experiences Semantic search systems Recommendations and retrieval systems AI copilots and assistants Prompt engineering and AI workflow design AI evaluation and feedback systems Backend & APIs Python, Node.js, or similar backend technologies Django, FastAPI, Express, or related frameworks REST APIs GraphQL PostgreSQL Data integrations Infrastructure AWS Docker Kubernetes CI/CD Frontend deployment pipelines Monitoring and observability platforms Data PostgreSQL Redis Search platforms Analytics platforms Data visualization Event tracking and experimentation systems